 inventors and innovators there are a number of sages wizards and other such personages who although not well-known in the general sense have made a name for themselves in history as being the developer of a number of interesting or useful devices   heward   a compatriot of the great inventor murlynd during his adventuring days having since followed in his friend friend's path he is most well-known for the item known by many that bares his name the   heward heward's handy haversack handy haversack   combining the enchantments of a normal   bag of holding   with the design of an adventurer adventurer's pack this item is indispensable to many travelers today less well-known but equally innovative is his   heward heward's mystical organ mystical organ   an expression of his bardic talents a combination of excellent design and creative magical applications this mystical musical instrument was powered by a number of ensorcelled air elementals and said to be so complicated that only heward himself could play it without flaw story has it that this organ was originally developed to test heward 's belief that a single song could describe the universe adn the proper melody could impose its effects upon the world; if true then it seems he was quite successful another of murlynd 's allies   daern   is believed by some to have been the one to have inspired murlynd to develop his unique blend of technology and magic in the first place although this is debated by others it is true though that his original work   components and reactions of phosphorus   was one of the first recorded blends of the two fields showing how this compound could be used to manipulate or affect a number of relatively common pyromantic incantations through the applications of research of a definitely scientific nature following in the footsteps of daern is a current researcher in the field from furyondy   thomas arbane   much as daern 's earlier work arbane is well-known for looking at how common compounds influence existing spells as seen in his first work   sulphur influence and actions   a look at the use of the aforementioned substance in a collection of spells manipulating the element of fire he continued branching further off of the pre-existing work in the field with a variety of studies of this nature focusing on a wide variety of magical fields   mizaab zalen   a mage of the city of greyhawk specializing in the art of flight many of the flight spells known to oerth now were improved upon to their current point by mizaab and many items regarding this ability currently in circulation have been traced to his creation not merely limited to flight of a mystical nature he is also credited with the development of a number of devices made in an attempt to achieve such a feat mechanically including various sorts of wings gliders and even an attempt at a mechanical bird made to carry two men unfortunately all his attempts to date have failed horribly and his theories in this vein are considered by most learned men to be completely unviable also a master aerial cartographer mizaab is credited with the development of his own system of recording the variations on different types of slopes of a terrain unfortunately his predilection for ranting on the subject of the semi-mythical greyhawk dragon dragons and certain more autere spell theories have hurt his reputation among the circles of magi a somewhat recent development in the field of navigation was put forward by one   harold bestemen   of furyondy in the year 536 cy overcast conditions often make traditional navigational methods unusable in the days from harvester through planting a large portion of the year and one does not always have access to a priest of celestian or fharlanghn to aid in determining ones location this sailor however noticed certain useful properties of lodestones allowing them to be used to alter small metal needles in such a way that they can be used to identify north or south this device which many know today as a compass has been invaluable to many sailors or explorers especially in other areas similarly afflicted with poor weather for stellar reckoning although since retired from his days as a navigator he still offers his expertise to those seeking it in the city of willip another important sailing innovation spawns from monmurg capital of the hold of the sea princes through   hakima al-basira   an ekbir expatriate although not responsible for any original inventions her astronomical observations resulted in her developing a much improved model of the baklunish astrolabe in 565 cy one currently spreading widely throughout the coastal cities of the flanaess in addition her treatise on astronomy the   almanach perpetuum   is known to many the continent over as an expert work in its field a major development in mining came via the actions of   charles vondesmerc   of bellport in the great kingdom foreman of a minor mine in the surrounding hills around 510 cy his workers while extracting copper ore managed to crack into a small artesian flooding the lower reaches of the mine and killing almost 20 slave laborers activity was at a halt for weeks until vondesmerc had the idea of applying an old concept in a new way he came up with the concept of using a common method of easily grinding corn the water wheel instead of turning a mill however this wheel would instead be used to drain the water from the bottom of the shaft attaching it to a block-and-tackle-like system to which was installed a series of buckets this idea soon caught on leading to the use of the water wheel now in a wide variety of applications; running bellows grinding ore and in at least one case even using a hammer at a smithy to jump into the somewhat-distant past the first refracting telescope was developed in 378 cy by  sir eddard divalens   of dyvers within 50 years the concept has spread across the flanaess and today this item is well-known if still uncommon in all seafaring lands 